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junio-gpg-pub
v0.99
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32 Commits (7cb038a692ec0bdc0f442380678e8e87e26d4e68)
Author | SHA1 | Message | Date |
---|---|---|---|
Eric Wong | 7d6fb370bc |
short circuit out of a few places where we would allocate zero bytes
dietlibc versions of malloc, calloc and realloc all return NULL if they're told to allocate 0 bytes, causes the x* wrappers to die(). There are several more places where these calls could end up asking for 0 bytes, too... Maybe simply not die()-ing in the x* wrappers if 0/NULL is returned when the requested size is zero is a safer and easier way to go. Signed-off-by: Eric Wong <normalperson@yhbt.net> Signed-off-by: Junio C Hamano <junkio@cox.net> |
19 years ago |
Junio C Hamano | 9f70b80692 |
rename detection with -M100 means "exact renames only".
When the user is interested in pure renames, there is no point doing the similarity scores. This changes the score argument parsing to special case -M100 (otherwise, it is a precision scaled value 0 <= v < 1 and would mean 0.1, not 1.0 --- if you do mean 0.1, you can say -M1), and optimizes the diffcore_rename transformation to only look at pure renames in that case. Signed-off-by: Junio C Hamano <junkio@cox.net> |
19 years ago |
Junio C Hamano | 27dedf0c3b |
GIT 0.99.9j aka 1.0rc3
Signed-off-by: Junio C Hamano <junkio@cox.net> |
19 years ago |
Junio C Hamano | 3299c6f6a8 |
diff: make default rename detection limit configurable.
A while ago, a rename-detection limit logic was implemented as a response to this thread: http://marc.theaimsgroup.com/?l=git&m=112413080630175 where gitweb was found to be using a lot of time and memory to detect renames on huge commits. git-diff family takes -l<num> flag, and if the number of paths that are rename destination candidates (i.e. new paths with -M, or modified paths with -C) are larger than that number, skips rename/copy detection even when -M or -C is specified on the command line. This commit makes the rename detection limit easier to use. You can have: [diff] renamelimit = 30 in your .git/config file to specify the default rename detection limit. You can override this from the command line; giving 0 means 'unlimited': git diff -M -l0 We might want to change the default behaviour, when you do not have the configuration, to limit it to say 20 paths or so. This would also help the diffstat generation after a big 'git pull'. Signed-off-by: Junio C Hamano <junkio@cox.net> |
19 years ago |
Junio C Hamano | 8082d8d305 |
Diff: -l<num> to limit rename/copy detection.
When many paths are modified, rename detection takes a lot of time. The new option -l<num> can be used to disable rename detection when more than <num> paths are possibly created as renames. Signed-off-by: Junio C Hamano <junkio@cox.net> |
20 years ago |
Junio C Hamano | 5098bafb75 |
Plug diff leaks.
It is a bit embarrassing that it took this long for a fix since the problem was first reported on Aug 13th. Message-ID: <87y876gl1r.wl@mail2.atmark-techno.com> From: Yasushi SHOJI <yashi@atmark-techno.com> Newsgroups: gmane.comp.version-control.git Subject: [patch] possible memory leak in diff.c::diff_free_filepair() Date: Sat, 13 Aug 2005 19:58:56 +0900 This time I used valgrind to make sure that it does not overeagerly discard memory that is still being used. Signed-off-by: Junio C Hamano <junkio@cox.net> |
20 years ago |
Junio C Hamano | 6bac10d89d |
Fix copy marking from diffcore-rename.
When (A,B) ==> (B,C) rename-copy was detected, we incorrectly said that C was created by copying B. This is because we only check if the path of rename/copy source still exists in the resulting tree to see if the file is renamed out of existence. In this case, the new B is created by copying or renaming A, so the original B is lost and we should say C is a rename of B not a copy of B. Signed-off-by: Junio C Hamano <junkio@cox.net> |
20 years ago |
Junio C Hamano | 75c660ac93 |
[PATCH] Use enhanced diff_delta() in the similarity estimator.
The diff_delta() interface was extended to reject generating too big a delta while we were working on the packed GIT archive format. Take advantage of that when generating delta in the similarity estimator used in diffcore-rename.c Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Linus Torvalds | 75c42d8cc3 |
Add a "max_size" parameter to diff_delta()
Anything that generates a delta to see if two objects are close usually isn't interested in the delta ends up being bigger than some specified size, and this allows us to stop delta generation early when that happens. |
20 years ago |
Junio C Hamano | 2210100ac0 |
[PATCH] Fix rename/copy when dealing with temporarily broken pairs.
When rename/copy uses a file that was broken by diffcore-break as the source, and the broken filepair gets merged back later, the output was mislabeled as a rename. In this case, the source file ends up staying in the output, so we should label it as a copy instead. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 0e3994fa97 |
[PATCH] diff: Clean up diff_scoreopt_parse().
This cleans up diff_scoreopt_parse() function that is used to parse the fractional notation -B, -C and -M option takes. The callers are modified to check for errors and complain. Earlier they silently ignored malformed input and falled back on the default. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 355e76a4a3 |
[PATCH] Tweak count-delta interface
Make it return copied source and insertion separately, so that later implementation of heuristics can use them more flexibly. This does not change the heuristics implemented in diffcore-rename nor diffcore-break in any way. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | f345b0a066 |
[PATCH] Add -B flag to diff-* brothers.
A new diffcore transformation, diffcore-break.c, is introduced. When the -B flag is given, a patch that represents a complete rewrite is broken into a deletion followed by a creation. This makes it easier to review such a complete rewrite patch. The -B flag takes the same syntax as the -M and -C flags to specify the minimum amount of non-source material the resulting file needs to have to be considered a complete rewrite, and defaults to 99% if not specified. As the new test t4008-diff-break-rewrite.sh demonstrates, if a file is a complete rewrite, it is broken into a delete/create pair, which can further be subjected to the usual rename detection if -M or -C is used. For example, if file0 gets completely rewritten to make it as if it were rather based on file1 which itself disappeared, the following happens: The original change looks like this: file0 --> file0' (quite different from file0) file1 --> /dev/null After diffcore-break runs, it would become this: file0 --> /dev/null /dev/null --> file0' file1 --> /dev/null Then diffcore-rename matches them up: file1 --> file0' The internal score values are finer grained now. Earlier maximum of 10000 has been raised to 60000; there is no user visible changes but there is no reason to waste available bits. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 2cd68882ee |
[PATCH] diff: fix the culling of unneeded delete record.
The commit
|
20 years ago |
Junio C Hamano | 01c4e70f63 |
[PATCH] diff: code clean-up and removal of rename hack.
A new macro, DIFF_PAIR_RENAME(), is introduced to distinguish a filepair that is a rename/copy (the definition of which is src and dst are different paths, of course). This removes the hack used in the record_rename_pair() to always put a non-zero value in the score field. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | f0c6b2a2fd |
[PATCH] Optimize diff-tree -[CM] --stdin
This attempts to optimize "diff-tree -[CM] --stdin", which compares successible tree pairs. This optimization does not make much sense for other commands in the diff-* brothers. When reading from --stdin and using rename/copy detection, the patch makes diff-tree to read the current index file first. This is done to reuse the optimization used by diff-cache in the non-cached case. Similarity estimator can avoid expanding a blob if the index says what is in the work tree has an exact copy of that blob already expanded. Another optimization the patch makes is to check only file sizes first to terminate similarity estimation early. In order for this to work, it needs a way to tell the size of the blob without expanding it. Since an obvious way of doing it, which is to keep all the blobs previously used in the memory, is too costly, it does so by keeping the filesize for each object it has already seen in memory. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 15d061b435 |
[PATCH] Fix the way diffcore-rename records unremoved source.
Earier version of diffcore-rename used to keep unmodified filepair in its output so that the last stage of the processing that tells renames from copies can make all of rename/copy to copies. However this had a bad interaction with other diffcore filters that wanted to run after diffcore-rename, in that such unmodified filepair must be retained for proper distinction between renames and copies to happen. This patch fixes the problem by changing the way diffcore-rename records the information needed to distinguish "all are copies" case and "the last one is a rename" case. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 1a0756ffe4 |
[PATCH] Remove unused rank field from diff_core structure.
This removes a field that is no longer used from diff_score structure. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 226406f693 |
[PATCH] Introduce diff_free_filepair() funcion.
This introduces a new function to free a common data structure, and plugs some leaks. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | a00d7d106a |
[PATCH] Fix math thinko in similarity estimator.
The math to reject delta that is too big was confused. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 8597697458 |
[PATCH] Update rename/copy similarity estimator.
The second round similarity estimator simply used the size of the xdelta itself to estimate the extent of damage. This patch keeps that logic to detect big insertions to terminate the check early, but otherwise looks at the generated delta in order to estimate the extent of edit more accurately. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 25d5ea410f |
[PATCH] Redo rename/copy detection logic.
Earlier implementation had a major screw-up in the memory management area. Rename/copy logic sometimes borrowed a pointer to a structure without any provision for downstream to determine which pointer is shared and which is not. This resulted in the later clean-up code to sometimes double free such structure, resulting in a segfault. This made -M and -C useless. Another problem the earlier implementation had was that it reordered the patches, and forced the logic to differentiate renames and copies to depend on that particular order. This problem was fixed by teaching rename/copy detection logic not to do any reordering, and rename-copy differentiator not to depend on the order of the patches. The diffs will leave rename/copy detector in the same destination path order as the patch that was fed into it. Some test vectors have been reordered to accommodate this change. It also adds a sanity check logic to the human-readable diff-raw output to detect paths with embedded TAB and LF characters, which cannot be expressed with that format. This idea came up during a discussion with Chris Wedgwood. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | bceafe752c |
[PATCH] Fix diff-pruning logic which was running prune too early.
For later stages to reorder patches, pruning logic and rename detection logic should not decide which delete to discard (because another entry said it will take over the file as a rename) until the very end. Also fix some tests that were assuming the earlier "last one is rename or keep everything else is copy" semantics of diff-raw format, which no longer is true. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | f7c1512af8 |
[PATCH] Rename/copy detection fix.
The rename/copy detection logic in earlier round was only good enough to show patch output and discussion on the mailing list about the diff-raw format updates revealed many problems with it. This patch fixes all the ones known to me, without making things I want to do later impossible, mostly related to patch reordering. (1) Earlier rename/copy detector determined which one is rename and which one is copy too early, which made it impossible to later introduce diffcore transformers to reorder patches. This patch fixes it by moving that logic to the very end of the processing. (2) Earlier output routine diff_flush() was pruning all the "no-change" entries indiscriminatingly. This was done due to my false assumption that one of the requirements in the diff-raw output was not to show such an entry (which resulted in my incorrect comment about "diff-helper never being able to be equivalent to built-in diff driver"). My special thanks go to Linus for correcting me about this. When we produce diff-raw output, for the downstream to be able to tell renames from copies, sometimes it _is_ necessary to output "no-change" entries, and this patch adds diffcore_prune() function for doing it. (3) Earlier diff_filepair structure was trying to be not too specific about rename/copy operations, but the purpose of the structure was to record one or two paths, which _was_ indeed about rename/copy. This patch discards xfrm_msg field which was trying to be generic for this wrong reason, and introduces a couple of fields (rename_score and rename_rank) that are explicitly specific to rename/copy logic. One thing to note is that the information in a single diff_filepair structure _still_ does not distinguish renames from copies, and it is deliberately so. This is to allow patches to be reordered in later stages. (4) This patch also adds some tests about diff-raw format output and makes sure that necessary "no-change" entries appear on the output. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 60896c7bfe |
[PATCH] Be careful with symlinks when detecting renames and copies.
Earlier round was not treating symbolic links carefully enough, and would have produced diff output that renamed/copied then edited the contents of a symbolic link, which made no practical sense. Change it to detect only pure renames. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 6b14d7faf0 |
[PATCH] Diffcore updates.
This moves the path selection logic from individual programs to a new diffcore transformer (diff-tree still needs to have its own for performance reasons). Also the header printing code in diff-tree was tweaked not to produce anything when pickaxe is in effect and there is nothing interesting to report. An interesting example is the following in the GIT archive itself: $ git-whatchanged -p -C -S'or something in a real script' Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 26dee0adfc |
[PATCH] Add the code to set default minimum score back in.
When the minimum score is specified as 0 (meaning "use default value"), set it to the default as we are told. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | cd1870edb6 |
[PATCH] Fix tweak in similarity estimator.
There was a screwy math bug in the estimator that confused what -C1 meant and what -C9 meant, only in one of the early "cheap" check, which resulted in quite confusing behaviour. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 81e50eabf0 |
[PATCH] The diff-raw format updates.
Update the diff-raw format as Linus and I discussed, except that it does not use sequence of underscore '_' letters to express nonexistence. All '0' mode is used for that purpose instead. The new diff-raw format can express rename/copy, and the earlier restriction that -M and -C _must_ be used with the patch format output is no longer necessary. The patch makes -M and -C flags independent of -p flag, so you need to say git-whatchanged -M -p to get the diff/patch format. Updated are both documentations and tests. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 38c6f78059 |
[PATCH] Prepare diffcore interface for diff-tree header supression.
This does not actually supress the extra headers when pickaxe is used, but prepares enough support for diff-tree to implement it. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 58b103f55d |
[PATCH] Tweak diffcore-rename heuristics.
The heuristics so far was to compare file size change and xdelta size against the average of file size before and after the change. This patch uses the smaller of pre- and post- change file size instead. It also makes a very small performance fix. I didn't measure it; I do not expect it to make any practical difference, but while scanning an already sorted list, breaking out in the middle is the right thing. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 52e9578985 |
[PATCH] Introducing software archaeologist's tool "pickaxe".
This steals the "pickaxe" feature from JIT and make it available to the bare Plumbing layer. From the command line, the user gives a string he is intersted in. Using the diff-core infrastructure previously introduced, it filters the differences to limit the output only to the diffs between <src> and <dst> where the string appears only in one but not in the other. For example: $ ./git-rev-list HEAD | ./git-diff-tree -Sdiff-tree-helper --stdin -M would show the diffs that touch the string "diff-tree-helper". In real software-archaeologist application, you would typically look for a few to several lines of code and see where that code came from. The "pickaxe" module runs after "rename/copy detection" module, so it even crosses the file rename boundary, as the above example demonstrates. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |
Junio C Hamano | 427dcb4bca |
[PATCH] Diff overhaul, adding half of copy detection.
This introduces the diff-core, the layer between the diff-tree family and the external diff interface engine. The calls to the interface diff-tree family uses (diff_change and diff_addremove) have not changed and will not change. The purpose of the diff-core layer is to provide an infrastructure to transform the set of differences sent from the applications, before sending them to the external diff interface. The recently introduced rename detection code has been rewritten to use the diff-core facility. When applications send in separate creates and deletes, matching ones are transformed into a single rename-and-edit diff, and sent out to the external diff interface as such. This patch also enhances the rename detection code further to be able to detect copies. Currently this happens only as long as copy sources appear as part of the modified files, but there already is enough provision for callers to report unmodified files to diff-core, so that they can be also used as copy source candidates. Extending the callers this way will be done in a separate patch. Please see and marvel at how well this works by trying out the newly added t/t4003-diff-rename-1.sh test script. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
20 years ago |